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INDIAN INSTITUTE OF SCIENTIFIC HERITAGE www.iish.org In general the powdered drugs are mixed with required quantity of water and mixed with jaggery, sugar and honey. In some cases a part or whole of the drugs is boiled to get more medicinal extracts which is used as the source/ starting material for the fermentation. The Common Arishtas and Asavas described in Sahasra Yoga Test Book 1. Dasamoolaarishtam 2. Amruthaarishtam 3. Kutajaarishtam 4. Draakshaarishtam 5. Abhayaarishtam 6. Balarishtam 7. Devadaarvaarishtam 8. Asokaarishtamjeerakaarishtam 9. Khadirashtam 10. Karpoorasavam 11. Pippalyaaadi asavam 12. Punarnavaasavam 13. Usiraashtam 14. Aravindaarishtam 15. Patrangaasavam CHEMISTRY OF LEHAS/ LEHYAS /RASAAYANAAS The lehyas and Rasayanaas are semi solid, generally, pasty materials having both nutritious and curative effects. The product is generally prepared directly from the drug components after powdering them or cooking. The cooked/ powdered materials are mixed with jaggerry and heated slowly for a long time. The final product should have a semisolid/ solid honey type texture and appearance. Ghee, honey, spices etc are also added to the lehya / rasayana at the end of the preparations. The active principles present in the raw drugs, with or without hydrolytic and pyrrolitic chemical changes get dissolved in the jaggery based rasayanam. Here the starch, protein and also the fat present in the raw materials give texture for the rasayana. Due to the presence of excess sugar of this product, faster absorption of the active principles may be taking place in the biological system because the sugar is known to get absorbed faster . However, available literature gives less information on the clinical study results on the active principles based curative effects of the lehya/ rasayana. Heat and water based changes of the rasayana / lehyas are 54
INDIAN INSTITUTE OF SCIENTIFIC HERITAGE www.iish.org inevitable because the final products are heated for a long duration for getting the actual paste like product. Inorganic chemicals/salts are also sometimes added as directed in rasachikitsa texts. Lehas and Rasayanas given in Sahasra Yogam 1. Vilwaadileham 2. Kooshmaanda leham 3. Maanibhadra leham 4. Manibhadragulam 5. Pinchaadileham 6. Draakshaaadi leham 7. Thippalaadi rasaayanam 8. Thiruvruthaadi leham 9. Sataavarigulam 10. Aswagandhaadi leham 11. Ikshuraadi leham 12. Madhusnuhi rasaayanam 13. Vyoshaadi rasaayanam 14. Dasamoolaadi leham 15. Chitrakagulam 16. Agastyarasayanam 17. Kalyaanavaleham 18. Dantihareetakee leham 19. Madanakaameswara leham 20. Kutajaavalehyam 21. Lavangamaodakam 22. Kanchataavalehyam 23. Dasamoola gulam 24. Vyaaghraadi lehyam 25. Amruthagulgulu lehyam 26. Punarnavaadilehyam 27. Gandhakarasaayanam 28. Bhangeesarkara lehyam 29. Chyavanapraasam lehyam 55
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